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L. S. PFOUTS. PASTEURIZER.

APPLICATION FILED MAR. 27. I916.

1 05,833. Patented June 3, 1919.

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L.s.'PF0uTs. PASTEURIZER.

APPLICATION FILED MAR. 2? i916.

Patented June 3, 1919.

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LEROY S. PFOUTS, OF CANTON, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE MILLER PAS'IEURIZING MACHINE COMPANY, OF CANTON, OHIO, A CORPORA- TION OF OHIO.

PASTEURIZER.

Original application filed January 25, 1909, Serial No. 474,128.

Specification of Letters Patent.

1916. Serial No. 87,016.

To all whom it may concern:

Be it known that I, LEROY S. Proo'rs, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented certain new and useful Improvements in and Relating to Pasteurizers, of which the following is a specification.

This invention relates to a pasteurizing apparatus, and particularly to that type of pasteurizer shown and described in Letters Patent No. 878,225, issued to John C. Miller, February 4, 1908.

This application is a division of application filed January 25, 1909, Serial No. 474,128, the patent on which issued May 16, 1916, No. 1,183,764.

One object of the invention is to provide in pasteurizing apparatus having underneath driving or power transmitting mecha nism, a durable, rigid, simple and sanitary mounting for the heating and cooling apparatus, either or both.

Another object of the invention is to provide improved supporting devices between certain parts of either or both of the heating apparatus and the cooling apparatus.

Another object of the invention is to provide improved means for supporting the vessels of the heater and cooler, either or both, whereby they are maintained in concentric relationship at all times.

Another object of the invention is to provide improved means for supporting the vessels of the heater and cooler, either or both, to insure proper positioning of the vessels relative to each other when assembled.

Another object of the invention is to provide an improved pasteurizing apparatus having concentric vessels, the bottoms of which are shaped for correlation with each other to insure cooperation with each other and durability of the apparatus.

Another object of the invention is to provide a pasteurizing apparatus having concentric vessels, the bottoms of certain of which are provided with improved means adz pted to support one vessel on the other.

Another obgect of the invention is to provide a pasteurizing apparatus having concentric, relatively movable vessels, the bottoms of which are shaped and constructed to withstand the strains and stresses due to the weight of the material being treated and the heating or cooling medium and the rotation of the movable vessel.

These and other objects of the invention will be apparent to those skilled in the art to which my invention relates from the following description taken in connection with the accompanying drawings.

For the purpose of illustration I have, in the accompanying drawings, shown and herein described one form of apparatus embodying my invention.

Figure 1 is an elevation of a liquid treating apparatus embodying my invention.

Fig. 2 is a top plan view of the base for supporting the series of liquid treating devices, the vertical shafts being shown in section.

Figs. 3 and 4 are respectively longitudinal and transverse sectional views of the base and standards supported thereon.

Figs. 5 and 6 are central vertical sections of the heater and cooler, respectively.

Figs. 7 and 8 are sectional views (parts broken away) on the lines 7-7 and 88, of Figs. 5 and 6, respectively.

In the drawings A, B and C indicate, respectively, the heating, preliminary cooling and final cooling apparatus of my pasteurizer. D indicates a milk containing receptacle which supplies milk to the heating apparatus.

1 indicates a base cast or otherwise formed of suitable metal. This base is adapted to rest on afloor or other plane surf-ace and is preferably curved transversely to give it great strength and supporting capacity consistent with lightness in weight and economy of space and metal. 2, 2 2?, indicate openings formed in the upper surface of the base. Surrounding each of the said openings is a horizontal supporting surface or boss 2, preferably ring-shaped and formed integral with the base 1.

3, 3 3', indicate a series of pedestals or standards, preferably tubular in form, and each provided at its lower end with a flange The flange 3 corresponds in shape to and rests on a supporting boss 2 of the base 1. The pedestals are preferably formed with openings or cut-away portions 3 to reduce their weight and to economize metal, as well as to facilitate the cleaning ofthe pedestals.

4 indicate bolts extending through apertures in the supports or bosses 2 and flanges 3 for securing the pedestals in uprigl-it position on the base.

The pedestals 3, 3 3 are of different heights and arranged in descending order on the base so that the heating and cooling appanatus A, B and C areflsupp'orted at different levels, whereby the liquid to be treated may-flow by gravity from the heater A which is supported on the highest pedestal,

.3, firstto the cooler B, which is supported on the next highest pedestal, 3, and finally to the cooler 0 supported on the pedestal 3 The standards 3, 3 3", at or near their upper ends, are ,preferably enlarged orintermediate vessel 6. The intermediate vessel 6 is somewhat smaller than the vessel 5 to form therewith a relatively large water containing space or chamber 5. The vessels 6 and 8 are of such size relative to each other that they form a reduced or narrow circulating space 6 for the liquid to be treated between their adjacent walls.

6 indicates a helical rib, mounted in the circulating space 6. This rib is preferably carried by the vessel 6 or 8, and extends across the space between the two vessels to form a helical spiral conduit 6" between them from the bottom of the said space 6 to the top thereof.

The vessels 5 and 8 are adapted to contain water or other suitable heating medium so that the liquid flowing through the conduit 6" in a thin film or ribbon will be quickly, uniformly and thoroughly heated to the desired temperature. The walls of the vessel 5 preferably comprise an inner cylinder 5, and an outer cylinder 5*, with an insulating jacket 5 of cork or other suitable non-conductor of heat between them. The bottom of the vessel 5 is provided with an annular boss 5 adapted to rest on the pedestal 3, and a stepped or raised portion 5 concentric withthe center of the vessel.

7 8, indicate the bottoms of the vessels '6 and 8, respectively, each of which is concavoconvex in form, permitting them to be assembled together with a relatively narrow space between them. 7 indicates an an nular boss or supporting rib,- preferably formed integral with the bottom 7, and havinga flat lower surface arranged to rest on the upper surface of the stepped annular portion 5 of the vessel 5. The purpose of this construction is to insure proper relastrains upon the side walls 6 of the intermediate vessel 6, which walls are relatively thin to permit heat conduction to the liquid in the conduit 6". v

7 indicates a sleeve secured to the bottom 7 of the intermediate vessel 6 and extending downward through the bottom 5 of the vessel 5. 7 indicates a stufling box around the sleeve 7 tonprevent loss of the heating medium' which may escape past the support or boss 7 8 indicates a bearingblock between the water containing vessel 8 and the vessel 6 and arranged to hold the bottoms of the said vessels slightly separated, each from the other.

9 indicates a plurality of bored ears or lugs, preferably formed integral with the base 1 on its inner or lower surface and adapted to support a main driving shaftlO. 10 10", indicate fast and loose pulleys, respectively, on the shaft 10. 11 indicates a pluralityof worms fixed to the shaft 10 and arranged below the heater A and coolers B and C. The worms 11 mesh with gears 12, each of which is fixed to a verticalshaft 13. Each shaft 13 is mounted at its lower end in a bearing 13 carried by or formed in a transverse bar or member 13 which is formed integral with or secured to the base 1. 14 indicates a cross bar or member arranged within each pedestal 3. lt indicates a bearing for each shaft 13 111OLlI1t6dC811- trally in the cross member 14 of the ad jacent pedestal 3. 15 indicates a collar, carried by each shaft 13 and provided with a set screw 15" for looking it to the shaft. This collar engages with the under side of the cross member 14 or bearing 14 and prevents the shaft from moving endwise in an upward direction.

16 indicates a stuffing box at the lower endof the bushing or sleeve 7*.

17 indicates a relatively long hollow shaft arranged within the cylinder 8. This hollow shaft is secured at or near its lower end to the bottom of the said cylinder and the bearing block 8", and at or near its upper end to a spider 17 carried by the cylinder 8 near its open end. The hollow shaft 17 fits snugly around the shaft 13 and operates to keep the cylinder in perfect alinement.

18 indicates a socket piece of any suitable construction adapted to fit over an irregular shaped part or plug 13 formed on the upper end of the shaft 13. The socket piece 18 operates to lock the shaft 13 and hollow shaft 17 together and thus communicate motion from the said shaft to the cylinder 8.

20 indicates a conduit, provided with a funnel 20 at its upper end, surrounding the hollow shaft 17 and preferably supported in position by the spider 17 The conduit preferably extends to the bottom of the vessel 8 and is provided with an opening or openings at its lower end to permit the escape of liquid therefrom into the vessel 8. The heating medium delivered into the funnel 20 is directed by the conduit 20 to the bottom of the vessel 8 and is allowed to rise therein.

22 indicates a delivery or supply pipe for the liquid to be pasteurized, having a funnel or receiving receptacle 22 at its upper end and a connection 22 leading through the lower part of the vessels 5 and 6, and communicating with the helical conduit 6". 22 indicates a conduit leading from the supply tank D to the funnel 22 and controlled by a valve 22'.

23 indicates a trough surrounding the upper end of the vessel 6 and into which the treated liquid is delivered from the helical conduit 6".

24 indicates an annular cover for the trough 23. It is preferably supported andv carried by the vessel 8. The purpose of the cover 24: is to convey water overflowing from the vessel 8 to the vessel 5, while precluding its getting into the trough 23.

The water circulating means for the heater A comprises two steam pipes 25, 26, which are connected with a suitable supply. The pipe 25 leads into the vessel 5 and is provided with a distributor or water heater 25 prefer-ably arranged near the bottom of the said vessel 5. As the steam passes through the pipe 25 into the distributer 25 water in the vessel 5 is sucked into the distributer or heater and ejected therefrom. The steam pipe 26 extends down into the vessel 5 below the water level therein, and is then connected with an up-take pipe 26 which terminates at its free end in a nozzle 26. The nozzle 26 discharges the water and heating medium into the funnel 20*.

26 indicates an ejector carried by the steam pipe 26 below the water level in the vessel 5. The function of the ejector is to permit the steam flowing through the pipes 26 and 26 to elevate water from the chamber 5 and discharge it into the funnel 20 and conduit 20. From the conduit 20, the

water rises in the vessel 8, flowing over the cover 24 back into the chamber 5. From the foregoing description it will be understood that the distributor 25 and ejector 26 serve to produce a circulation of the water around the chamber 5 and also from the chamber 5 to the vessel 8 and back again, and at the same time maintain the water in both the chamber and cylinder substantially uniformly heated.

The preliminary cooler B comprises a series of vessels, 27 being the outer vessel, 28 the inner vessel, and 29 the intermediate vessel, arranged concentrically and one within the other. The vessels 28 and 29 are preferably of a size relative'to each other so that there is formed between their opposing walls a reduced passageway 30 for the liquid to be treated. Within the passageway is preferably provided a helical rib 30 to form a helical conduit from the bottom to the top thereof. The bottoms of the vessels 28 and 29 are of concave-convex form which permits them to be assembled together with a relatively narrow uniform space between them.

The outer vessel 27 is preferably provided with an annular bottom 27 which rests directly upon the pedestal 3*. The bottom 27 is provided around its outer edge with an integral, upwardly extending flange 27 to which the side wall of the vessel is secured in any well known manner. an upwardly extending, annular boss or ring preferably formed integral with the inner edge of the bottom 27. The upper surface of the boss 27 b is preferably flat.

28 indicates an annular rib secured to or formed integral with the under surface of the bottom of the intermediate vessel 29. The lower surface of the rib 28 is preferably flat and rests on the annular boss 27 of the vessel 27. This construction of support operates to maintain the vessels 28 and 29 concentric with the axis of the vessel 27, as well as to insure the ready assembly of the vessels in proper relationship relative to each other.

32 indicates a metal cylinder arranged between the outer vessel 27 and the intermediate vessel 29. This cylinder is bent or pressed to form a helical groove 32 surrounding the cylinder 29 and extending from one end to the other of the said cylinder.

The driving mechanism for the preliminary cooler B and the connections of the inner cylinder 28 therewith are preferably like similar parts for the heater Ayalready described, so that no further description of them is required; and the same may be said of the trough at the top of the helical passageway and the overhanging guard there for. Surrounding the sleeve shaft for the 27 b indicates I groove 32 inner cylinder is a conduit 20*, which leads to the bottom of the cylinder 28. At its upper end the conduit is provided with a funnel 20 to receive the cooling medium; at its lower end, the conduit is formed with openings through which the cooling medium escapes into the cylinder. The cooling medium rises in the cylinder and flows over the cover 24 into an annular trough 24? which surrounds the cooler and from which the water may be discharged in any suitable manner.

33 is an inlet pipe communicating with the top convolution of the groove 32 and supplies the cooling medium thereto. 33 indicates the outlet for the cooling medium leading from the lower convolution of the 41 indicates a pipe leading from the outlet 33 to the annular trough 243.

.35 indicates a branch pipe leading from r the inlet pipe 33 and provided with a nozzle '35 arranged to discharge the cooling medium into'the funnel 20 of the inner ves' sel28.

36, 36" indicate valves, carried by the pipes 33 and 35, respectively, to control the flow of the cooling medium therethrough.

37' indicates a funnel or receptacle arranged to receive the liquid being treated from a discharge pipe 37. which leads from the trough 23 of the heater. 37 indicates an outlet pipe for the receptacle 37, connected by a pipe 37 tothe lower end of the passageway 30 between the vessels 28, 29.

38 indicates a pipe for conveying the liquid from the trough 23 to the final cooler C. The final cooler C is preferably of identically similar construction to the preliminary cooler B.

The cooling medium for the final cooler C may be water. For this purpose there is connected with the supply pipe 33 a valve controlled pipe 39, provided with a valvecontrolled branch 39, which convey water to the inner cylinder 28 and the helical groove 32, respectively. I prefer, however,

' force due to the rotation of the innermost cylinder. Due to this centrifugal force and the fact that the bottoms of the intermediate and innermost cylinders are concavo-convexed shape, the material is maintained away from the opening through the bottom of the intermediate cylinder forthe driven shaft, so that during operation of the apparatus none of the material can possibly leak through such opening.

It will be-noted that the connection between the inner rotatable cylinder and the driving shaft is such that the inner cylinder may be freely drawn upwardly for the purpose of removing it when it is desired to clean the walls of the helical passageway through which the liquid to betreated is caused to flow. Besides being simple of operation, this driving connection between the rotatable cylinder and the driving shaft is a substantial and durableone and lends itself admirably to the maintenance of concentricity between the rotatable vessel and the intermediate vessel.

It will also be noted that the bottom of the intermediate vessel of the heaterand each cooler extends beyond and depends below the amiular supporting member on the adjacent outer vessel this construction pre- 1 apparatus herein described operates in the well known manner of the apparatus described and patented in Letters Patent No.

'87 8,225 issued to John C. Miller, hereinbefore referred to, so that it is not deemed necessary to describe in detail the course of a char s of milk or other liquid to be treated through the apparatus.

To those skilled in the art to which this invention relates many alterations in construction and widely difiering embodiments and applications of my invention will suggest themselves without departing from the spirit and scope thereof. My disclosures and description herein are purely illustrative and are not intended to be in any sense limiting.

What I claim is:

1. In a liquid treating apparatus, the combination of an outer vessel, an inner vessel, an intermediate vessel, and a pair of cooperating annular supporting members between the bottoms of the outer vessel and inter mediate vessel, the supporting member on the outer vessel being elevated above the bottom thereof and of smaller diameter than said intermediate vessel and the supporting member on the intermediate vessel being arranged intermediate its axis and the periphery of its bottom.

2. In a liquid treating apparatus, the combination of an outer vessel, an inner vessel, an intermediate vessel, an annular boss carried by the bottom of the outer vessel and arranged concentric to the axis thereof, the said boss being of smaller diameter than the diameter of the bottom of the intermediate vessel, and; an. annular rib formed integral I with the bottom of the intermediate vessel and arranged intermediate of the axis of said vessel and the peripheral edge of its bottom and cooperating with said boss to support the outer and intermediate vessels concentrically to each other.

3. In a liquid treating apparatus, the combination of an outer vessel, an inner vessel, an intermediate vessel, a pair of cooperating annular supporting members between the bottoms of the outer vessel and intermediate vessel, the supporting member on the outer vessel being elevated above the bottom thereof and of smaller diameter than said intermediate vessel and the supporting member on the intermediate vessel being arranged intermediate the periphery thereof and the axis of said vessel, and means extending through the bottoms of said outer and intermediate vessels for rotating the inner vessel.

at. In liquid treating apparatus of the character described, the combination of a series of vessels arranged concentrically one within the other and formed with axial openings in their bottoms, a sleeve carried by the bottom of the intermediate vessel and extending downwardly through the opening in the bottom of the outer vessel, a sleeve shaft extending axially of said inner vessel and secured thereto at its opposite ends, the upper end of said sleeve shaft terminating at or near the open end of said inner vessel, a driven shaft extending through said sleeve and sleeve shaft, and means for securing the sleeve shaft and driven shaft together.

5. In liquid treating apparatus of the Copies of this patent may be obtained for character described, the combination of a series of vessels arranged concentrically one within the other and formed with axial openings in their bottoms, a bearing member between the intermediate vessel and the inner vessel permitting the latter to rotate, a sleeve shaft extending axially of said inner vessel and secured thereto at its opposite ends, a driven shaft extending through the openings in the bottoms of the vessels and said sleeve shaft of the inner vessel and operating to maintain the latter concentrically of the other vessels during its rotation, and means for detachably securing the sleeve shaft and driven shaft together.

6. In liquid treating apparatus, the combination of a series of vessels arranged concentrically one within the other and formed with alined axial openings in their bottoms, means for rotatably supporting the bottom of the innermost vessel upon the bottom of the intermediate vessel, a sleeve shaft extending axially of said innermost vessel and connected thereto at or near its opposite ends, a driven shaft extending through the axial openings in the bottoms of said vessels and said sleeve shaft of the innermost vessel and operating to maintain the latter concentrically of the other vessels during its rotation, and means for connecting the sleeve shaft and driven shaft together.

In testimony whereof I aflix my signature.

LEROY S. PFOUTS.

Witness Gno. B. Prrrs.

five cents each, by addressing the Commissioner of Patents,

Washington, I). G.

IL is hereby certified that in Letters Patent No. 1,305,833, granted June 3, 1919,

upon the application of Leroy S. Pfouts, of Canton, Ohio, for an improvement in Pasteurizers, an error appears in the printed specification requiring correction as follows: Page 5, claim 4, line 30, commencing With the article the strike out all to and including the word vessel, line 32; and-that the said Letters Patent should be read with this correction therein that the same may conform to the record of the ease in the Patent Ofiice.

Signed and sealed this 5th day of August, A. D., 1919.

R. F. WHITEHEAD,

[SEAL] 4 Acting Commissioner of Patents. 

